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<h2><span class="refentrytitle"><a name="gtk3-Feature-Test-Macros.top_of_page"></a>Version Information</span></h2>
<p>Version Information — Variables and functions to check the GTK+ version</p>
</td>
<td valign="top" align="right"></td>
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<div class="refsynopsisdiv">
<a name="gtk3-Feature-Test-Macros.synopsis"></a><h2>Synopsis</h2>
<pre class="synopsis">
#include &lt;gtk/gtk.h&gt;

<a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-major-version" title="gtk_get_major_version ()">gtk_get_major_version</a>               (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-minor-version" title="gtk_get_minor_version ()">gtk_get_minor_version</a>               (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-micro-version" title="gtk_get_micro_version ()">gtk_get_micro_version</a>               (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-binary-age" title="gtk_get_binary_age ()">gtk_get_binary_age</a>                  (<em class="parameter"><code><span class="type">void</span></code></em>);
<a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-interface-age" title="gtk_get_interface_age ()">gtk_get_interface_age</a>               (<em class="parameter"><code><span class="type">void</span></code></em>);
const <a href="../glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-check-version" title="gtk_check_version ()">gtk_check_version</a>                   (<em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_major</code></em>,
                                                         <em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_minor</code></em>,
                                                         <em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_micro</code></em>);

#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION">GTK_MAJOR_VERSION</a>
#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION">GTK_MINOR_VERSION</a>
#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION">GTK_MICRO_VERSION</a>
#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-BINARY-AGE:CAPS" title="GTK_BINARY_AGE">GTK_BINARY_AGE</a>
#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-INTERFACE-AGE:CAPS" title="GTK_INTERFACE_AGE">GTK_INTERFACE_AGE</a>
#define             <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-CHECK-VERSION:CAPS" title="GTK_CHECK_VERSION()">GTK_CHECK_VERSION</a>                   (major,
                                                         minor,
                                                         micro)
</pre>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.description"></a><h2>Description</h2>
<p>
GTK+ provides version information, primarily useful in configure checks
for builds that have a configure script. Applications will not typically
use the features described here.
</p>
</div>
<div class="refsect1">
<a name="gtk3-Feature-Test-Macros.details"></a><h2>Details</h2>
<div class="refsect2">
<a name="gtk-get-major-version"></a><h3>gtk_get_major_version ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gtk_get_major_version               (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns the major version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 3.)
</p>
<p>
This function is in the library, so it represents the GTK+ library
your code is running against. Contrast with the <a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION"><span class="type">GTK_MAJOR_VERSION</span></a>
macro, which represents the major version of the GTK+ headers you
have included when compiling your code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the major version number of the GTK+ library</td>
</tr></tbody>
</table></div>
<p class="since">Since 3.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-minor-version"></a><h3>gtk_get_minor_version ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gtk_get_minor_version               (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns the minor version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 1.)
</p>
<p>
This function is in the library, so it represents the GTK+ library
your code is are running against. Contrast with the
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION"><span class="type">GTK_MINOR_VERSION</span></a> macro, which represents the minor version of the
GTK+ headers you have included when compiling your code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the minor version number of the GTK+ library</td>
</tr></tbody>
</table></div>
<p class="since">Since 3.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-micro-version"></a><h3>gtk_get_micro_version ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gtk_get_micro_version               (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
Returns the micro version number of the GTK+ library.
(e.g. in GTK+ version 3.1.5 this is 5.)
</p>
<p>
This function is in the library, so it represents the GTK+ library
your code is are running against. Contrast with the
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION"><span class="type">GTK_MICRO_VERSION</span></a> macro, which represents the micro version of the
GTK+ headers you have included when compiling your code.
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>the micro version number of the GTK+ library</td>
</tr></tbody>
</table></div>
<p class="since">Since 3.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-binary-age"></a><h3>gtk_get_binary_age ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gtk_get_binary_age                  (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
返回编译 GTK+ 库时传递给<span class="application">libtool</span> 的 binary age。如
果你不使用 <span class="application">libtool</span>，那么可以忽略此函数。
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>GTK+ 库的 binary age</td>
</tr></tbody>
</table></div>
<p class="since">Since 3.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-get-interface-age"></a><h3>gtk_get_interface_age ()</h3>
<pre class="programlisting"><a href="../glib/glib-Basic-Types.html#guint"><span class="returnvalue">guint</span></a>               gtk_get_interface_age               (<em class="parameter"><code><span class="type">void</span></code></em>);</pre>
<p>
返回编译 GTK+ 库时传递给<span class="application">libtool</span>的 interface age。
如果不使用 <span class="application">libtool</span>，可以忽略此函数。
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody><tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>GTK+ 库的 interface age</td>
</tr></tbody>
</table></div>
<p class="since">Since 3.0</p>
</div>
<hr>
<div class="refsect2">
<a name="gtk-check-version"></a><h3>gtk_check_version ()</h3>
<pre class="programlisting">const <a href="../glib/glib-Basic-Types.html#gchar"><span class="returnvalue">gchar</span></a> *       gtk_check_version                   (<em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_major</code></em>,
                                                         <em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_minor</code></em>,
                                                         <em class="parameter"><code><a href="../glib/glib-Basic-Types.html#guint"><span class="type">guint</span></a> required_micro</code></em>);</pre>
<p>
检测使用中的 GTK+ 库是否与给定的版本相兼容。你需要为这一函数传入三个常量
<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MAJOR-VERSION:CAPS" title="GTK_MAJOR_VERSION"><span class="type">GTK_MAJOR_VERSION</span></a>，<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MINOR-VERSION:CAPS" title="GTK_MINOR_VERSION"><span class="type">GTK_MINOR_VERSION</span></a>，<a class="link" href="gtk3-Feature-Test-Macros.html#GTK-MICRO-VERSION:CAPS" title="GTK_MICRO_VERSION"><span class="type">GTK_MICRO_VERSION</span></a>，以检测表示的版本
是否与程序或模块编译时实际用到的库相兼容。 
</p>
<p>
兼容性由两件事情决定： 第一是实际运行库要比要求的版本( <em class="parameter"><code>required_major</code></em>.
required_minor.<em class="parameter"><code>required_micro</code></em> )高；第二运行库必须与要求的版本
<em class="parameter"><code>required_major.required_minor</code></em>.<em class="parameter"><code>required_micro</code></em> 在内容上兼容（主版本号相同）。
</p>
<p>
这一函数主要用于 GTK+ 模块；模块中调用这一函数来检测是否载入了一个不兼容版本
的 GTK+ 库。然而，这一检测并不是完全可信的。因为一些模块可能链接了一个更早版
本的 GTK+ 库，并且调用了老版本的 <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-check-version" title="gtk_check_version ()"><code class="function">gtk_check_version()</code></a> 函数，但仍能被载入到使用
新版本 GTK+ 的应用程序中。
</p>
<p>
如果 GTK+ 库与给出的版本相兼容则返回 <a href="../glib/glib-Standard-Macros.html#NULL:CAPS"><code class="literal">NULL</code></a>，否则返回一字符串来描述其中的不匹
配。返回的字符串属于 GTK+ 库本身，不要对其进行修改或释放。
</p>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_major</code></em> :</span></p></td>
<td>要求的主版本号</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_minor</code></em> :</span></p></td>
<td>要求的子版本号</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>required_micro</code></em> :</span></p></td>
<td>要求的微版本号</td>
</tr>
</tbody>
</table></div>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MAJOR-VERSION:CAPS"></a><h3>GTK_MAJOR_VERSION</h3>
<pre class="programlisting">#define GTK_MAJOR_VERSION (3)
</pre>
<p>
Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-major-version" title="gtk_get_major_version ()"><code class="function">gtk_get_major_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MINOR-VERSION:CAPS"></a><h3>GTK_MINOR_VERSION</h3>
<pre class="programlisting">#define GTK_MINOR_VERSION (0)
</pre>
<p>
Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-minor-version" title="gtk_get_minor_version ()"><code class="function">gtk_get_minor_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-MICRO-VERSION:CAPS"></a><h3>GTK_MICRO_VERSION</h3>
<pre class="programlisting">#define GTK_MICRO_VERSION (10)
</pre>
<p>
Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-micro-version" title="gtk_get_micro_version ()"><code class="function">gtk_get_micro_version()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-BINARY-AGE:CAPS"></a><h3>GTK_BINARY_AGE</h3>
<pre class="programlisting">#define GTK_BINARY_AGE    (10)
</pre>
<p>
Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-binary-age" title="gtk_get_binary_age ()"><code class="function">gtk_get_binary_age()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-INTERFACE-AGE:CAPS"></a><h3>GTK_INTERFACE_AGE</h3>
<pre class="programlisting">#define GTK_INTERFACE_AGE (10)
</pre>
<p>
Like <a class="link" href="gtk3-Feature-Test-Macros.html#gtk-get-interface-age" title="gtk_get_interface_age ()"><code class="function">gtk_get_interface_age()</code></a>, but from the headers used at
application compile time, rather than from the library linked
against at application run time.
</p>
</div>
<hr>
<div class="refsect2">
<a name="GTK-CHECK-VERSION:CAPS"></a><h3>GTK_CHECK_VERSION()</h3>
<pre class="programlisting">#define             GTK_CHECK_VERSION(major,minor,micro)</pre>
<div class="variablelist"><table border="0">
<col align="left" valign="top">
<tbody>
<tr>
<td><p><span class="term"><em class="parameter"><code>major</code></em> :</span></p></td>
<td>major version (e.g. 1 for version 1.2.5)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>minor</code></em> :</span></p></td>
<td>minor version (e.g. 2 for version 1.2.5)</td>
</tr>
<tr>
<td><p><span class="term"><em class="parameter"><code>micro</code></em> :</span></p></td>
<td>micro version (e.g. 5 for version 1.2.5)</td>
</tr>
<tr>
<td><p><span class="term"><span class="emphasis"><em>Returns</em></span> :</span></p></td>
<td>
<a href="../glib/glib-Standard-Macros.html#TRUE:CAPS"><code class="literal">TRUE</code></a> if the version of the GTK+ header files
is the same as or newer than the passed-in version.</td>
</tr>
</tbody>
</table></div>
</div>
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